Award Data

SOLID BORON HAS LONG BEEN RECOGNIZED AS A POTENTIAL HIGH VOLUMETRIC DENSITY PROPELLANT FOR VOLUME LIMITED ROCKET AND AIR BREATHING PROPULSION SYSTEMS. HOWEVER, ACHIEVING THIS POTENTIAL HAS BEEN DIFFICULT DUE TO LOW COMBUSTION AND HEAT RELEASE EFFICIENCIES IN CONVENTIONALLY DESIGNED COMBUSTORS. A THREE PHASE MODEL OF BORON ASSISTED COMBUSTION IS POSTULATED AND THE ROLE THAT KINETIC SENSITIVITY ANAL ...

THE OBJECTIVE OF THE PROPOSED PROGRAM IS TO INITIALLY CHARACTERIZE THE PERFORMANCE OF A NEW CLASS OF CALCIUM CELLSWHICH USE AN ORGANIC CATHOLYTE. BASED ON INITIAL DATA, THISCLASS OF CELLS WILL HAVE THE ENERGY AND POWER DENSITIES OF BOBBIN-TYPE LI/SOC12 CELLS. THE MAJOR ADVANTAGES OF THIS NEW CLASS OF CELLS ARE ITS HIGH PERFORMANCE LEVEL, THE NON-CORROSIVE NATURE OF ITS CATHOLYTE, THE LOW COST OF I ...

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THIS PROPOSAL COVERS THE DEVELOPMENT OF A CRYOCOOLER WITH A REFRIGERATION CAPACITY OF 0.75 WATT AT 20 KELVIN. THE CRYOGENIC UNIT WILL HAVE A VOLUME OF LESS THAN 16 CM3, AND CAN PROVIDE COOLING FOR 5 MINUTES AFTER A COOLDOWN PERIOD OF LESS THAN 20 SECONDS. THE CRYOCOOLER USES A NEW FABRICATION TECHNIQUE THAT LEADS TO A HIGH RELATIVE EFFICIENCY WITH A MINIMUM VOLUME.

GROUND-BASED ASTRONOMICAL IMAGING IS LIMITED BY THE POOR SEEING CONDITIONS THAT RESULT FROM ATMOSPHERIC TURBULENCE IN THE VIEWING PATH. MULTIPLE-MIRROR AND SEGMENTED-MIRROR TELESCOPES REQUIRE ACTIVE OPTICAL WAVEFRONT CONTROL TO OBTAIN THE MAXIMAL RESOLVING POWER AVAILABLE FROM THEIR SYNTHETIC APERTURES. UNFORTUNATELY, TRADITIONAL ADAPTIVE OPTICAL SYSTEMS HAVE DEMONSTRATED POOR SCALABILITY TO LARGE ...

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THE DEVELOPMENT OF A LIQUID HELIUM TEMPERATURE CRYOCOOLER ISPLANNED. A REGENERATIVE CRYOCOOLER WILL PROVIDE A 20 K TEMPERATURE SINK OF A JOULE-THOMSON (J-T) STAGE USING HELIUM. AN INNOVATIVE DESIGN FOR THE J-T STAGE HEAT EXCHANGERS WILL ALLOW THE USE OF SIMPLE, HERMETIC COMPRESSORS, WHICH WILL MAKE A PORTABLE, LONG LIFETIME UNIT POSSIBLE. THE STUDY WILL FOCUS ON SYSTEMS HAVING A COOLING POWER OF L ...

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THE DESIGN OF FEEDBACK CONTROL LAWS FOR SYSTEMS WITH UNKNOWN PARAMETERS AND OTHER SIGNIFICIANT UNCERTAINTIES IS A FUNDAMENTAL PROBLEM IN THE AREA OF AEROSPACE VEHICLE CONTROL. THE APPLICATION OF DISTURBANCE ACCOMMODATING CONTROL (DAC) THEORY TO THIS AREA HAS RESULTED IN A REVOLUTIONARY APPROACH TO THE DESIGN OF ADAPTIVE CONTROL LAWS. THIS APPROACH HAS PROVEN TO BE EXTREMELY EFFECTIVE WHILE, AT THE ...

SEVERAL EXHAUST GAS NO(X) ABATEMENT PROCESSES EXIST BASED ON HETEROGENEOUS REACTION OF A REDUCED NITROGEN CONTAINING ADDITIVES SUCH AS NH(3). NONE OF THESE EXISTING PROCESSES CAN BE USED IN ITS PRESENT FORM TO MEET PROPOSED NO(X) EMISSIONS REGULATIONS ON JET TEST STATIONS AND INCINERATORS. WE PROPOSE TO TEST COMBINATIONS OF ADDITIVES AND CATALYSTS THAT HAVE THE POTENTIAL TO LEAD TO A NEW PROCESS O ...